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All Journal Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan
M Silalahi, Dio
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Earth & Planetary Sciences

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Trophic State of the Pekak Lake, Siak Hulu District, Kampar Regency Based on Trophic State Index M Silalahi, Dio; Siagian, Madju; Simarmata, Asmika Harnalin
Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan Vol 7, No 1 (2020): Edisi 1 Januari - Juni 2020
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Perikanan dan Ilmu Kelautan

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Abstract

ABSTRACTMany activities in the Pekak Lake contribute the input of organic and anorganic matter that affects the water quality, especially nutrient concentration in waters. A research aims to understand the trophic state of the Pekak Lake based on TSI has been conducted in March-April 2018. There were 3 stations, namely in the inlet, midle part of the lake and the end area of the lake. In each station,   there are 2 sampling points, in the surface (0.2 m) and 2 Secchi depth (0.75 m). Sampling were conducted 3 times, once/week. Water quality parameters measured were total phosphate, chlorophyll-a, transparancy, dissolved oxygen, CO2,pH and temperature. Results shown that the total phospate was 0.152-0.508 mg/L, chlorophyll-a 7.061-11.186 µg/L, transparency: 0.69-0.77 m, dissolved oxygen: 5.36-5.96 mg/L, CO2:8.81-16 mg/L, pH: 5, temperature: 27-30oC and TSI (Trophic State Index) value:  64.559-70.465. Based on TSI, the Pekak Lake can be categorized as moderate eutrophic-hypereutrophic.Keywords: Kampar River, Eutrophic-hypereurophic, Oxbow Lake, TSI
Co-Authors Asmika Harnalin Simarmata Madju Siagian